diff --git a/contact-center/assets/mysql.upgrade.db.sh b/contact-center/assets/mysql.upgrade.db.sh
index 0b8a63b6..ec4a78dd 100755
--- a/contact-center/assets/mysql.upgrade.db.sh
+++ b/contact-center/assets/mysql.upgrade.db.sh
@@ -10,14 +10,15 @@ MYSQL_WRITEMODE_IP=`parse_host ${SPRING_DATASOURCE_URL}`
 MYSQL_WRITEMODE_PORT=`parse_port ${SPRING_DATASOURCE_URL}`
 CONTACT_CENTER_DB=`parse_dbname ${SPRING_DATASOURCE_URL}`
 CONTACT_CENTER_WAR=/opt/chatopera/contact-center.war
-UPGRADE_DB_SCRIPT_DIR=/tmp/ROOT/upgrade
+APP_WAR_EXTRACTED=/tmp/ROOT
+UPGRADE_DB_SCRIPT_DIR=$APP_WAR_EXTRACTED/upgrade
 
 println "[upgrade] connecting to $MYSQL_WRITEMODE_IP:$MYSQL_WRITEMODE_PORT/$CONTACT_CENTER_DB with $SPRING_DATASOURCE_USERNAME/****"
 
 # functions
 function upgrade_db(){
     if [ ! -f $1 ]; then exit 1; fi
-    println "run MySQL DB upgrade script" $1 "..."
+    println "[upgrade] run MySQL DB upgrade script" $1 "..."
     mysql -u ${SPRING_DATASOURCE_USERNAME} \
         -h ${MYSQL_WRITEMODE_IP} \
         -P ${MYSQL_WRITEMODE_PORT} -p${SPRING_DATASOURCE_PASSWORD} \
@@ -33,23 +34,11 @@ function extract_war(){
     println "extract SQL script ..."
     if [ -f $CONTACT_CENTER_WAR ]; then
         cd /tmp
-        if [ -d ROOT ]; then 
-            rm -rf ROOT
+        if [ -d $APP_WAR_EXTRACTED ]; then 
+            rm -rf $APP_WAR_EXTRACTED
         fi
 
         unzip -q $CONTACT_CENTER_WAR -d ROOT
-        if [ -f /tmp/ROOT/$MYSQL_SCRIPT_NAME ]; then
-            println "start to import database ..."
-            import_db /tmp/ROOT/$MYSQL_SCRIPT_NAME
-            # verify status
-            if [ ! $? -eq 0 ]; then
-                exit 1
-            fi
-            rm -rf /tmp/ROOT
-        else
-            println "SQL script not exist."
-            exit 1
-        fi
     else
         println "War file not exist."
     fi
@@ -57,9 +46,14 @@ function extract_war(){
 
 # main 
 [ -z "${BASH_SOURCE[0]}" -o "${BASH_SOURCE[0]}" = "$0" ] || return
+## check upgrade footprint
+if [ -f /opt/chatopera/upgrade.his ]; then
+    echo "[upgrade] upgrade has been done with previous start."
+    exit 0
+fi
 
 ## check root dir
-if [ ! -d /tmp/ROOT ]; then
+if [ ! -d $APP_WAR_EXTRACTED ]; then
     extract_war
 fi
 
@@ -74,4 +68,9 @@ if [ -d $UPGRADE_DB_SCRIPT_DIR ]; then
             exit 1
         fi
     done
+fi
+
+## touch upgrade footprint
+if [ ! -f /opt/chatopera/upgrade.his ]; then
+    touch /opt/chatopera/upgrade.his
 fi
\ No newline at end of file